Matsushita's wife, Miyaka, and Kikuchi's wife, Yuki, are not only neighbors but also share the same situation of having husbands on business trips. They have been close for a long time. One day, Yuki's husband collapses, so Yuki's son Masayuki is taken in by the Matsushita family. Before leaving, Miyaka learns from Yuki that Masayuki is a 'virgin' and can't hide her interest in him. A few hours later, Miyaka decides to give Masayuki an unforgettable first-time experience...
